Shade-holding adapter for incandescent electric lamps.



, F. PETRY SHADE HOLDING ADAPTER FOR INCANDESCENT ELECTRIC LAMPS-APPLICATION FILED SEPT-8,1917.

l %6% l Patented Apr. 23, 1918.

WITNESSES IIVVE/V TOR ATTORNEYS I naeaiaa,

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installed so that a vacuum I device or the like can be applied to thesocket which 13:1 TETY, till" IBOOKLYN, NEW YORK, ASSTGNOR h ONE-HALF T0LAWRENCE S. HARRISON, 0F BROOKLYN, NEW YQRK.

SHJE'HULJDG APTJE FOE INCANDESCENT ELECT 'lIC LPS.

pecification of Letters Patent.

Patented hprm 23, tall;

hppltcation'tlled September 8, 191?. serial No. 190,897.

To all whom it may concern;

Be it known that l, bnnonnron Pn'rmr, a citizen of the United States,and aresident of borough of Brooklyn, city of New York, State of NewYork, have invented a new and Improved Shade-Holding Adapter forlincandescent Electric Lamps, of which the following is a full, clear,and exact description.

This invention relates to an incandescent lamp shade holding adapter orto a combined lamp and shade holder and attaching plug especiallydesigned to permit the entire device to be removed as a unit from anystandard screw base socket permanently cleaner, heating without thetrouble or necessity of loosening the shade-holding screws, as is nowcom monly the case. I a The invention has for its general objects toprovide a device of this character which is of comparatively simple andinexpensive construction, reliable and efificient in use, and

.so designed that, the shade and lampcan be detached from a v lampsocket just as easily as the removin of a simple 1am A more specificobject of the invention is the provision of an incandescent lamp adapterso designed as to have permanently attached thereto a shade or shadeholder, the parts being so constructed that the adapter can be attachedto or removed from a standard screw base socket without taking out elamp separately or removing the shade.

With such objects in view and others will appear as the descriptionproceeds, the invention comprises various novel features of constructionand arrangement of parts which will be set forth with particularity inthe following description and claims appended hereto.

1n the accompanying drawing, which illustrates one embodiment of theinvention and wherein similar characters of reference indicatecorresponding parts in both the the base 9 of an incandescent lamp shadeholder,

formed with a reduced portion or neck 2. Fitted over the body is a screwbase ferrule 3 of conducting material which is adapted to screw into alamp socket, and on the inner or lower end of this ferrule is screwed asupporting and conducting sleeve 4: which has a reduced portion 5fitting the neck 2 of the body 1, the loweriend of the reduced portion 5being provided with a thread 6 on which screws the threaded neck 7 ofthe screw base receptacle 8 into which is screwed 10. Passing throughthe body 1 is a bolt 11 having a nut 12 which forms one terminal of theadapter, the other terminal-being formed by the shell or ferrule 3. Thehead 13 of the bolt is adapted to engage the central contact '14 of thelamp and between the head and body 1 is clamped a metal washer 15 whichhas interposed between it and the shoulder 16 of the receptacle'8 afiber washer 17. An insulating grip ring 18 surrounds the sleeve 5 andit forms a support for the shade element 19 which has a threaded neck 20screwed onto the reduced portion of the grip ring 18, said grip ringserving to enable the adapter to be readily handled in applying orremoving it. The shade element 19 may take theform of a complete shadeor simply a as shown in the drawing. It is insulated from thecurrent-conducting parts of the device by the ring 18 and a fiber cup 21which is clamped between the shoulder 16 and the ring 18, andsurrounding the v '][n this manner the receptacle 8 is externallyprotected against grounding.

From the foregoing description taken in connection with the accompanyingdrawing, the advantages of the construction and method of operation willbe readily understood by those skilled in the art to which the inventionappertains,and while have described the principle of operation, togatherwith the device which ]['now consider to have it understood that thedevice shown is merely illustrative and that such changes may be madewhen desired as fall within the scape of the appended claims. I

aving thus described my invention, l[ claim as new and desire to secureby Letters Patent:

1. A device of the class described comto be the best embodiment thereof,desire llld prising a body of insulation, a screw base ferrule fittedaround one end of the body and a screw base receptacle at the other endof the body and connected with the ferrule, a member extending throughthe body and cooperating with the receptacle to engage the terminals ofa lamp and cooperate With the ferrule to engage the terminals of a lampsocket, a shade element and an insulating shell-like body surroundingthe receptacle and the lower portion of the firstmentioned body andhaving a reduced portion with which the shade element is engaged, theshell-like insulating body having a portion extending upwardly from theshade element to form an insulating grip.

2. A device of the class described comprising a body of insulationhaving a reduced portion, a screw base ferrule on the said body, asleeve surrounding the reduced portion of the body and having a threadedconnection with the ferrule, a screw base receptacle having a threadedconnection with the sleeve, a bolt passing through the body and forminga contact cooperating with the ferrule to engage the contacts of a lampsocket, said receptacle having an internal shoulder, washers at theinner end of the body and held by the bolt, with one washer engaging theshoulder of the said receptacle, a grip ring of insulation surroundingthe sleeve, and a shade element having a threaded connection with thegrip ring.

3. A device of the class described comprising a body of insulationhaving a reduced portion, a screw base ferrule on the said body, asleeve surrounding the reduced portion of the body and having a threadedconnection with the ferrule, a screw base receptacle having a threadedconnection with the sleeve, a bolt passing through the body and forminga contact cooperating with the ferrule to engage the contacts of a lampsocket, said receptacle having an internal shoulder, washers at theinner end of the body and held by the bolt, with one washer engaging theshoulder of the said receptacle, a grip rim of insulation surroundingthe sleeve, a s ade element engaged with the grip ring, a cup-shapedelement surrounding the said receptacle and cooperating with the gripring to insulate the shade element from the receptacle and sleeve, andan insulation ring surrounding the receptacle and interposed between thesame and the cupshaped element.

FREDERICK PETRY.

